Employees at Freiberg’s Fraunhofer Institute for Solar Energy Systems are bathed in sunlight, filtered through solar panels. Germany’s green energy push is the subject of the cover story in the March 11, 2014 issue of The Christian Science MonitorWeekly magazine.

Rich silver deposits first lured settlers to Germany‘s Freiburg im Breisgau back in the 12th century, but today this quaint city is anything but medieval. Freiburg is a prototype for a clean-energy future that Germany is aggressively pursuing.

Nations across the globe are looking increasingly to wind, water, and the sun to power their economies in the decades to come. But Germany stands apart as a global leader in the industrialized world’s push to limit fossil-fuel consumption. Forging a stable path to a post-carbon economy would be a watershed moment in human history – not to mention a tremendous economic boon for whoever finds the way. But it will not be easy to shift off the coal, oil, and natural gas that have powered global economic development for centuries.

In Freiburg – where silicon has overtaken silver as the city’s focus – the energy transition is getting a trial run.

Solar panels line the train station’s glassy facade, from which visitors alight into a bustling shopping district. Photovoltaic panels top the pitched roofs of churches, schools, and houses in sleepy residential quarters and help power the local soccer stadium and city hall. Students from all over the world study renewable-energy engineering at the University of Freiburg, established under the Habsburgs more than 500 years ago. After they graduate, they might get a job up the street at the Fraunhofer Institute for Solar Energy Systems, Europe‘s largest solar research facility.

Along the historical center’s cobblestones, where Marie Antoinette traveled en route to live not-so-happily-ever-after in France, slick modern trams run on electricity generated exclusively from water, wind, and the sun. When this corner of old Europe was flattened in an air raid six months before the fall of the Third Reich, Freiburg’s 13th-century cathedral was among a handful of buildings that survived – the Gothic Münster‘s spire still soars over the sleepy square below but shares the skyline with wind turbines spinning on nearby peaks.

Freiburg’s passion for alternative energy dates back to protests that blocked the construction of a nearby nuclear plant in the 1970s. But Ukraine’s 1986 Chernobyl nuclear disaster further galvanized locals, and the green momentum grew as the threat of climate change came into focus.

Over the decades, Freiburg expanded its own clean-energy and efficiency infrastructure and worked with regional utilities that trade largely in wind, solar, and hydro power.

By 2011, when Japan’s Fukushima Daiichi nuclear plant rekindled anti-nuclear sentiments and prompted the immediate shutdown of Germany’s oldest nuclear plants, Freiburg had already cut its carbon dioxide emissions by nearly 20 percent from 1992 levels. And it aims to cut 20 percent more by 2030. But even as it has built an economy and identity around efficiency and renewable energy, Freiburg gets only about 5.5 percent of its electricity from locally generated, renewable sources. The rest is a mix of renewable and nonrenewable energy from regional utilities. Plans are under way to install additional wind energy capacity locally and enact more efficiency measures, with the goal of using 100 percent renewable energy by 2050.

It is difficult enough to transform how a quiet city’s 230,000 residents heat their homes, cook their food, and light their streets. Doing the same for an industrialized superpower of 82 million is an entirely different affair. If Germany can demonstrate how to run a major economy on primarily sunlight, wind, and water, it would tip the global scales in favor of renewable energy and accelerate a worldwide shift away from fuels that contribute to global warming.